45215211 has 4 divisors (see below), whose sum is σ = 60286952. Its totient is φ = 30143472.

The previous prime is 45215207. The next prime is 45215227. The reversal of 45215211 is 11251254.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 45215211 - 2² = 45215207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45215111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7535866 + ... + 7535871.

It is an arithmetic number, because the mean of its divisors is an integer number (15071738).

Almost surely, 2^45215211 is an apocalyptic number.

45215211 is a deficient number, since it is larger than the sum of its proper divisors (15071741).

45215211 is a wasteful number, since it uses less digits than its factorization.

45215211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15071740.

The product of its digits is 400, while the sum is 21.

The square root of 45215211 is about 6724.2256803293. The cubic root of 45215211 is about 356.2554530406.

Adding to 45215211 its reverse (11251254), we get a palindrome (56466465).

The spelling of 45215211 in words is "forty-five million, two hundred fifteen thousand, two hundred eleven".